The S&P 500 could hit record highs soon if no major retaliation from Iran, Wharton professor Jeremy Siegel says

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• America's entry into the Israel-Iran conflict has markets on edge.
• But Jeremy Siegel predicts that stocks can still soar to fresh records.
• The Wharton professor views the market's muted reaction as a positive indicator.

The US attacks on Iranian nuclear facilities over the weekend have sparked fresh anxiety in markets, but there's a scenario in which stocks can soar to new records amid the conflict.